A unique adhesion apparatus on the eggs of the catfish Clarias gariepinus (Teleostei, Clariidae)

Rüdiger Riehi, Samuel Appelbaum

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Eggs of the catfish Clarias gariepinus were investigated for the first time using light and electron microscopy (SEM and TEM). In shape, they differ strongly from those of other teleosts, their characteristic profile resembling a fur cap. This shape is unique among the eggs of teleostean fishes. The eggs of C. gariepinus are attached to substrata at their animal pole, which shows an annular bulge consisting of numerous tiny attaching-filaments. These filaments seem to be a part of the zona radiata externa. The micropyle, located within the center of the annular bulge, is a straight opening in the zona radiata. Different ways of egg adhesion in teleosts were compared and discussed as well as the position of the micropyle with respect to fertilization.

Original languageEnglish
Pages (from-to)191-197
Number of pages7
JournalJapanese Journal of Ichthyology
Volume38
Issue number2
DOIs
StatePublished - 1 Jun 1991

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